Mrs. Smith's 7th Grade Science Class



Objective 56: Genetic DisordersObjective 56: I can describe the causes of Genetic Disorders Genetic disorder – abnormal condition that a person _____________________ through genes or chromosomesSome are caused by ____________________________ in the DNA of genesOthers are caused by changes in the overall structure or ___________________________________Cystic FibrosisBody produces abnormally thick mucus in the _____________ and _______________________The thick mucus fills the lungs making it hard to breatheCaused by ______________________allele on one chromosomethat is the result of a mutation in which ______________________________ are removed from a DNA moleculeSickle- Cell DiseaseAffects _____________________________________, protein in blood that carries O2When ________________________ concentrations are low blood cells have a sickle shapeThe sickle shape can clog blood vessels and cannot carry as much ______________ as normal shaped red blood cellsThe allele is ___________________________ with normal alleleA person with ____________sickle shaped alleles will have the diseaseA person with one allele will produce___________________ normal and sickle shaped cells. These people will not usually have symptoms of the disease HemophiliaA person’s blood clots very _________________________or not at allDo not produce one of the proteins needed for normal _________________________________________Small bumps and bruises may cause internal bleeding that can’t be controlledCaused by a ____________________ allele on the _________ chromosome________________________ disorder – occurs more frequently in __________________ Down Syndrome: Trisomy 21 Have an _______________________________ of chromosome 21 (instead of a pair the person has 3 copies)Most often occurs when chromosomes fail to __________________properly during _______________________Have some degree of mental retardation.Heart defects are also common, but can be treated______________________________________: Chart used to trace the inheritance of traits in humansCan track _____________________ or a _______________________________Managing Genetic Disorders Doctors used to only have Punnett Squares and pedigrees to help predict genetic disordersNow they have tools such as ___________________________________to help diagnose genetic disordersPeople with genetic disorders can be helped through medical care, education, job training, and other methods__________________________: Picture of all the chromosomes in a cellArranged in ___________________Can reveal whether a person has the correct number of ___________________________Genetic CounselingA couple with a family history of a genetic disorder can go to a genetic counselor for __________________Help couples ______________________________________________________________ of having a child with a particular genetic disorderDealing with Genetic Disorders _________________________________________ help people with some disordersEx. Physical therapy helps remove mucus from the lungs of people with cystic fibrosisTaking Folic Acid helps people with sickle-cell disease make more red blood cellsEducation and job training helps people with Down Syndrome find work in a variety of places of employment ................
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